Income tax return

I am filling the ITR of perosn. who is working with company and LIC Agent. I want to know expenses like Salary & other expenses like petrol, telephone etc. are eligible for exemption , which occcured against LIC Income . Those Expense are eligible or not for Exemption.

Please tel which form i should use for e filling. like :- ITR - 1, ITR - 2, ITR-3 , ITR - 4 or ITR 5

Please revert at the earliest